C313212111133131211331333133313331311331333133313232233112323311   >>    C31321211113313121133133313331333131133133313331323223311232331   <<    C313212111133131211331333133313331311331333133313232233112323313   >>      C313212111133131211331333133313331311331333133313232233112323312   >>